Reversing-valve for regenerative furnaces.



No. 634,907. Patented oct. I7, |899.

H. T. uEwELL.

BEVERSING VALVE FUR REGENEBATIVE FURNAGES..

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HUGH T. NEWELL, OF FITTSBURG, PENNSYLVANIA.

REVERSINGVALVE FOR REGENERATIVE FURNACES.

SPECIFICATION forming part of Letters Patent No. 634,907, dated October17, 1899.

Application led July 16, 1898. `Serial No. 686,175. (No model.)

.To rr/ZZ who/1t may concern.:

Be it known that I, HUGH T. NEWELL, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented or discovered a neW and useful Improvementin Reversing- Valves for Regenerative Furnaces, of which the followingis a full, clear, and eXact description, reference being had to theaccompanying drawings, forming part of this speciiication, in which-Figure 1 is a central vertical longitudinal section throughout my valve,showing the valve set for circulation of the gases in one direction.Fig. 2 is a similar partial View showing it set for circulation in theopposite direction. Fig. 3 is a detail sectional view of theoperating-cylinder. Fig. 4 is a cross-section taken on the line IV IV ofFig. 1. Fig. 5 is a face view of one of the mushroomvalves. Fig. Gis adetail sectional View illustrating the asbestos packing. 4

My invention relates to the class of reversin g-valves for regenerativefurnaces by which the currents and iiow of the gases are controlled andis designed for the purpose of simplifying the construction andoperation of such valves, While increasing their efficiency and avoidingtheir defects.

In valves employing pivoted gates of the butterfly type great accuracyand care are required in order to adjust the parts so as to insure agas-tight joint, while the tendency to Warpage under the effect of heatis liable to cause inequalities in the meeting faces. In theconstruction of myv valve I have obviated these difficulties and insuredeffective action of the valve, While rendering its operation easy andunder perfect control.

Referring now to the drawings, 2 3 are the i gas-fines leading to andfrom the regenerative chambers of a furnace, and 4 the flue leading tothe stack, the general arrangement of such flues conforming to thecustomary construction practiced by furnace-builders.

5 is the outer casing of the valve, made of sheet or cast metal andprovided with a lining` 6 of refractory material. The casing is providedat its upper central portion with a gascut-off valve 7, seated upon anannular seat 8, the valve and seat being surrounded by a gas-box 9,through which the gas is conveyed to the valve from any source ofsupply. This valve is provided with a supporting-rod 10, by which' it isoperated to open or close by raising or lowering from or io the seat.Lateral passages 11 11 Within the casing are formed by theouterinclosing shell 5 and an inner transverse partition 12, terminatingwithin each end of the casing and leaving downward passages 13. casingat the ends of the partition 12, corresponding with the outer verticalsides of the ports 2 3, and also in positions intervening between thegas-dues 2 3 and the stack-flue 4, are circular ports lll, located inpairs, one pair for each gas-flue, and provided with annular iianges 15,projecting inwardly toward the fine. Mounted on a horizontal shaft 16are mushroom-valves 17, adapted to be seated against either annularflange and to close the ports, as shown, the opposite ports being openedand permitting circulation of the gases, as indicated by the arrows.

The valves 17 have a central web and oppositely-projecting inner andouter annular iianges 1S, between which is inclosed the packing 19 ofasbestos or other suitable iireproof material. This packing is for thepurpose of yinsuring a tight joint against the annular flanges 15,against which the valve is designed to be forced with considerablepressure.

The shaft 16 is supported in a bearing 20 and in a stufng-box 2l, Withinwhich it is capable of free longitudinal movement, and motion istransmitted to the shaft by means of a piston 23 in the double-actinghydraulic cylinder 22, mounted outside the valve-casing'. Other meansmay be employed for operating the shaft-as, for instance, a rack andpinion or suitable levers-and I do not desire to be limited to the meansshown and described. Other chan ges or variations may be made in thedesign, proportions, or arrangement of my valve without departing frommy invention and Within the scope of the claims, since I do not desireto be limited to the eX- act form illustrated, but to include suchalterations as will suggest themselves to the skilled mechanic, andWithin the scope of my invention I desire to include all such differentarrangements or locations of the valve with relation to the fines andgas-supply conduit as may be found necessary or desirable Extendingacross the ICO in practical use, and it will be understood that theterms descriptive of the location of the parts is merely relative.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

1. A gas-valve for regenerative furnaces provided with downwardlyopening ports leading to the gas fines, an intermediate downwardly-openin g port leading to the stackiiue, a horizontal valve chamberprovided with valve-seats arranged vertically at each side of thegas-flue ports, a valve-rod mounted therein provided with valves adaptedto cover such valve-seats, and a common gas-inlet passage opening intoboth ends of the horizontal valve-chamber, substantially as set forth..

2. A gas-valve for regenerative furnaces provided with downwardly opening ports leading to the gas-lines, an intermediate downwardly-openin gport leading to the stackflue, a horizontal valve chamber provided withvalve-seats arranged vertically at each side of the gas-flue ports, avalve-rod mounted `therein provided with valves adapted to cover suchvalve-seats, a common gas-inlet passage opening into both ends of thehorizontal chamber, and a gas-inlet valve opening into the gas-passage',substantially as set forth.

3. A gas-valve for regenerative furnaces provided withports-communicating with the gas-dues of the furnace, an intermediateport Acommunicating with the stack-flue, a horizontal valve-chamberprovided with valveseats vertically arranged at each side of the gas-Hueports and provided with verticallyarranged annular faces against whichthe valves abut, a valve-rod mounted therein provided with valvesadapted to'covervsuch valve-seats, a common gas-inlet passage openinginto both ends of the horizontal chamber, and a gas-inlet-controllingvalve opening into the gas-passage, substantially as set forth.

4. In afgas-valve for regenerative furnaces, the combination with aseries of downwardlyopening ports communicating with the furnacegas-flues and stack-flue: of a horizontal valve-chamber provided withlaterally-opening ports provided with projecting flanges, communicatingwith such downwardly-opening ports, and aseries of horizontally-mountedreciprocating valves provided with packing material, mounted on a commonvalverod, adapted to be seated upon the laterallyopening ports, and acommon gas-inlet passage leading to the outer opposite lateral ports andhaving a gas-inlet-controlling valve, substantially as set forth.

5. In a valve of the class described, ahorizontal valve-chamber providedwith laterallyopening ports having projecting annular flanges, and aseries of similarly-arranged valves secured to a common valve-rod,provided with inner and outer annular anges adapted to embrace theport-ring iange, and with packing material inclosed between the flanges,substantially as set forth.

6. In combination with a furnace, gas-fines communicating therewith, astack-flue, and a port intermediate of the gas-lues and communicatingwith the stack-Hue: a gas-valve consisting of a longitudinalvalve-chamber, ports therein communicating with the gasflues andstack-fines respectively, val ve-seats arranged transversely across thelongitudinal valve-chamber on each sidev ofV the gas-due ports andprovided with projecting annular flanges, a surrounding chamber having acommon gas-inlet passage opening into both ends of the longitudinalchamber, a gas-inletcontrolling valve openingl into the gas-passage,movable valves having oppositely-proj ecting inner and outer annulariianges with intervening packing material arranged to seat upon theannular flanges of the transverselyarranged valve-seats, and a commonlongitudinal valve-stem upon which the movable valves are mounted, withmeans for operating such valve-stem and valves, substantially as setforth.

In testimony whereof I have hereunto set my hand. r

HUGH T. NEWELL.

Witnesses:

PETER J. EDWARDS, C. M. CLARKE.

